/**
*      author: Y_Yao
*      created: 2024-12-14 20:04:02
**/

#include<bits/stdc++.h>

#define int LL
using namespace std;
using LL = long long;
const LL LLINF = 1e18;
const int INF = 0x3f3f3f3f;
const int N = 100 + 7;
int n,r;

void solve()
{
    cin >> n >> r;
    while(n--)
    {
        int l,a;
        cin >> l >> a;
        if(l == 1)
        {
            if(r >= 1600 && r <= 2799)
            {
                r += a;
            }
        }
        else if(l == 2)
        {
            if(r >= 1200 && r <= 2399)
            {
                r += a;
            }
        }
    }

    cout << r << endl;
}

signed main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t = 1;
    //cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}